Question: What is the name of the treaty that founded the Soviet Union?
Paraphrase: What is the title of the settlement that established the Soviet Union?
SPARQL (Wikidata):  select distinct ?obj where { wd:Q15180 wdt:P457 ?obj . ?obj wdt:P31 wd:Q131569 } 
Answer: Treaty on the Creation of the Union of Soviet Socialist Republics